关键词: 石蒜属, 数量分类, 聚类分析, 主成分分析

Abstract: Based on the field observation and the data collected from references, cluster analysis and principal component analysis (PCA) for 35 characters of 13 species and 2 varieties of Lycoris from China were conducted.The results showed that 13 species and 2 varieties of Lycoris were classified into 8 subgroups and 2 groups based on Q cluster analysis, which basically agreed with the traditional taxonomic studies, and the hybrid origin viewpoint of L. albiflora, L. houdyshelii, L. straminea, L. rosea and L. haywardii was also supported.While L. anhuiensis as an independent species was not supported, it should be recognized as a variety of L. longituba due to their very close relationships.35 characters were divided into 7 groups according to R cluster analysis.The principal component analysis showed that 35 characters were intergrated into 5 principal components (PC) and their additive contributing rate amounted to 82.55%.16 major discriminating characters were selected according to the relativity between 5 PC and characters.Among them, the characters of bulb shape, lobe width, and the ratio of stamen length:lobes length may be used for division major group of Lycoris, and the lobes with stripes or not, filament color, perianth color, flowering stem diameter, apex and margin color of young leaves, and seeds or not may be the foundation of divided species.

Key words: Lycoris, numerical taxonomy, cluster analysis, principal component analysis